Work positioning is everything IMO. Whether you use a saw with one, or two hands, a stable base to execute your cuts is, for me the primary concern. People need to look at how they use a saw one handed ;no crossing of arms, sensible sized pieces if cutting & holding etc etc. Would I like to watch a new climber cut & hold with a saw - no. Should they be taught how to, in time - of course, they are going to try at some point, so at least give them some pointers to help them learn.
People seem to be getting twisted about this one or two handed affair, without nailing down the basics that cause the accidents. Fatigue, rushing, inexperience &poor technique. These are to me the bigger concerns & the root cause of a massive proportion of accidents. So to single out the end result & not the cause is just dumb in my opinion.
As an additional point, I have seen some really nasty and on one occasion, a life changing injury cause by cutting & holding using silky saws